How far is Miles City, MT from Libby, MT?
The driving distance from Miles City, MT to Libby, MT is about 682.2 miles (1097.9 km), with a travel time of about 12h 00m by car.
- The straight-line flight distance is about 474.2 miles (763.1 km).
- For a round trip, plan for roughly 24h 00m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 12h 00m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Town in Jefferson County, Montana
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Miles City and Libby.
Turn-by-Turn Driving Directions
Step-by-step road directions between Miles City and Libby.
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1
Start on Main Street
1.1 mi · 2 min · Main Street
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2
Continue straight
1.9 mi · 3 min
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3
Take the ramp straight
20 m · 2 sec
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4
Keep slight right
1487 ft · 36 sec
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5
Merge slight left
135.4 mi · 2 hr 19 min
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6
Merge slight left
2.8 mi · 3 min
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7
Continue straight
112.8 mi · 1 hr 52 min
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8
Continue straight
7 mi · 7 min
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9
Continue straight
113.4 mi · 1 hr 54 min
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10
Keep slight left to continue on I 90 West: Missoula
42.6 mi · 40 min
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11
Take the exit slight right toward US 12 East: Helena, Garrison
1.2 mi · 2 min
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12
At the end of the road, turn right
12.9 mi · 14 min
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13
Turn sharp left
32.5 mi · 35 min
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14
At the end of the road, turn left
23.8 mi · 26 min
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15
Turn right
91.1 mi · 1 hr 44 min
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16
At the end of the road, turn right
1821 ft · 39 sec
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17
Turn left
6.9 mi · 9 min
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18
Turn right onto US 93 South
4.8 mi · 6 min · US 93 South
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19
Turn left onto Kalispell Bypass
1305 ft · 25 sec · Kalispell Bypass
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20
Enter the roundabout and take exit 1 toward Kalispell Bypass
46 m · 2 sec · Kalispell Bypass
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21
Exit the roundabout onto Kalispell Bypass
1.6 km · 1 min · Kalispell Bypass
-
22
Enter the roundabout and take exit 2 toward Kalispell Bypass
52 m · 2 sec · Kalispell Bypass
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23
Exit the roundabout onto Kalispell Bypass
2.4 mi · 3 min · Kalispell Bypass
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24
Take the exit slight right toward US 2
1559 ft · 50 sec
-
25
Turn left onto West Idaho Street
1.6 mi · 2 min · West Idaho Street
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26
Enter the roundabout and take exit 2 toward the route
29 m · 1 sec
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27
Exit the roundabout
85.7 mi · 1 hr 37 min
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28
Arrive at your destination
0 m · 1 sec · West 9th Street
Car Route Details
A richer read on the saved driving route between Miles City and Libby.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Main Street
Merge slight left
135 mi · 02h 19m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Sunny leaving Miles City and Showers And Thunderstorms near Libby.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Miles City to Libby?
The road trip is about 682.2 miles (1097.9 km) and usually takes 12h 00m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Whitehall is a useful midpoint, sitting about 340.5 miles from Miles City and 341.7 miles from Libby.
How much longer is the road route than the straight-line distance?
The direct path is about 474.2 miles (763.1 km), while the road route adds roughly 208 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $93.70 one way or $187.41 round trip. Estimated CO2 is about 213.9 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Miles City and Showers And Thunderstorms near Libby.
Stop Ideas Near Whitehall
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Whitehall.
Butte, MT
Bozeman, MT
Flight Path Map
This map shows the direct air route between Miles City and Libby. Straight-line distance: 474.15 mi (763.07 km).
#1 Miles City
City in Custer County, Montana
| Population | 8,264 |
| Coordinates | 46.4083400, -105.8405600 |
| Altitude | 722 |
| Country | United States |
#2 Libby
City in Montana, United States
| Population | 2,845 |
| Coordinates | 48.3882900, -115.5560000 |
| Altitude | 639 |
| Country | United States |
End: Libby (-115.556, 48.38829)
Estimated Travel Time
Distance: 1098 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 22h 43m |
| 40 mph (64.37 km/h) | 17h 03m |
| 50 mph (80.47 km/h) | 13h 38m |
| 60 mph (96.56 km/h) | 11h 22m |
| 70 mph (112.65 km/h) | 09h 44m |
| 80 mph (129 km/h) | 08h 30m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $93.70 | $187.41 |
| Mid-grade | $4.23 | $101.84 | $203.68 |
| Premium | $4.55 | $109.49 | $218.99 |
| Diesel | $5.41 | $130.27 | $260.53 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Montana · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.